click below
click below
Normal Size Small Size show me how
Science Vocab 5
| Term | Definition |
|---|---|
| Periodic Table | an arrangement of elements in columns based on a set of properties that repeat from row to row |
| Period | a row in a periodic table of elements |
| group | a column of elements in a periodic table |
| periodic law | the pattern of repeating properties displayed by elements in the periodic table |
| Atomic mass unit | one twelfth the mass of a carbon -12 atom |
| metals | elements that are good conductors of heat and electric currents |
| transition metals | elements that form a bridge between elements on the left and right sides of the periodic table |
| nonmetals | elements that are poor conductors of heat and electric current |
| metalloids | Elements with properties that fall between those of metals and nonmetals |
| valence electron | an electron that is in the highest occupied energy level of an atom |
| alkali metals | The elements in Group 1A of the periodic table, not including hydrogen |
| halogens | The elements in Group 7A of the periodic table |
| noble gases | the elements in Group 8A of the periodic table |